Astrogirl-
Have you done a Google search on SDHelper.dll? There's a lot of info out there on it and it appears there are a lot of folks dealing with the same problem as you. It appears that through the search you might be able to find a solution to the problem.

I tried to see if there was a simple patch or download that would solve the problem but I didn't find one but that doesn't mean that there isn't one out there.

Have you tried contacting your tech support for your anti-virus software to see what they say about it?